Who owns INNOSPEC INC.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of IOSP from SEC Form 13F filings across 281 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 281 institutions disclosed 24.6M shares of INNOSPEC INC. worth $2.00B — about 99.8% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
281
13F holders
$2.00B
value, 2026 filers
99.8%
of shares outstanding (24.6M sh)
47
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of IOSP's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.4M | $356.6M | 0.0% | 17.8% | +13.0% |
| 2 | Allspring Global Investments Holdings, LLC | 1.9M | $154.7M | 0.2% | 7.7% | -18.3% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.9M | $153.4M | 0.0% | 7.6% | +1.3% |
| 4 | DIMENSIONAL FUND ADVISORS LP | 1.3M | $106.2M | 0.0% | 5.3% | +5.1% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 1.1M | $90.2M | 0.0% | 4.5% | -0.6% |
| 6 | STATE STREET CORP | 996,027 | $81.1M | 0.0% | 4% | +3.3% |
| 7 | Nuveen, LLC | 755,723 | $61.5M | 0.0% | 3.1% | +17.5% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 666,589 | $54.3M | 0.0% | 2.7% | +5.7% |
| 9 | GOLDMAN SACHS GROUP INC | 662,210 | $53.9M | 0.0% | 2.7% | +34.6% |
| 10 | VICTORY CAPITAL MANAGEMENT INC | 660,110 | $53.7M | 0.0% | 2.7% | -23.7% |
| 11 | TWO SIGMA INVESTMENTS, LP | 568,709 | $46.3M | 0.0% | 2.3% | -4.1% |
| 12 | AQR CAPITAL MANAGEMENT LLC | 482,545 | $39.3M | 0.0% | 2% | +54.6% |
| 13 | BROWN ADVISORY INC | 408,468 | $33.2M | 0.1% | 1.7% | +37.8% |
| 14 | JPMORGAN CHASE & CO | 370,574 | $30.0M | 0.0% | 1.5% | -13.0% |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 355,658 | $28.9M | 0.0% | 1.4% | -2.8% |
| 16 | GENDELL JEFFREY L | 324,504 | $26.4M | 0.2% | 1.3% | +10.2% |
| 17 | ROYCE & ASSOCIATES LP | 308,726 | $25.1M | 0.2% | 1.3% | +18.1% |
| 18 | NORTHERN TRUST CORP | 303,044 | $24.7M | 0.0% | 1.2% | +6.6% |
| 19 | Qube Research & Technologies Ltd | 285,849 | $23.3M | 0.0% | 1.2% | -29.7% |
| 20 | ACADIAN ASSET MANAGEMENT LLC | 273,999 | $22.3M | 0.0% | 1.1% | +123.6% |
| 21 | Assenagon Asset Management S.A. | 272,782 | $22.2M | 0.0% | 1.1% | -44.4% |
| 22 | Western Standard LLC | 236,833 | $19.3M | 6.5% | 1% | +4.4% |
| 23 | BANK OF AMERICA CORP /DE/ | 235,742 | $19.2M | 0.0% | 1% | -18.9% |
| 24 | MORGAN STANLEY | 230,793 | $18.8M | 0.0% | 0.9% | -2.0% |
| 25 | RENAISSANCE TECHNOLOGIES LLC | 185,000 | $15.1M | 0.0% | 0.8% | +55.6% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.